Unable to send runtime details in a mail

Question

Hi Gurus,
I've developed an application for leave management system. When a person applies for leave, a mail is sent to Manager for approval(done by using the api). However, the from_date and to_date are not being sent. Null values are printed for those values. The following is the api that  I  have used in the process.Please help me resolve this. Thanks in advance.
DECLARE
    l_body      CLOB;
BEGIN
    l_body := 'Leave applied from '||to_date(nvl(:P10_REQUEST_FROM_DATE,sysdate),'DD/MON/YYYY')||' to '||to_date(nvl(:P10_REQUEST_TO_DATE,sysdate),'DD/MON/YYYY')||utl_tcp.crlf||utl_tcp.crlf;
    l_body := l_body ||'  Sincerely,'||utl_tcp.crlf;
    l_body := l_body ||'  LMS Team'||utl_tcp.crlf;
    apex_mail.send(
        p_to       => '[email protected]',   -- change to your email address
        p_from     => '[email protected]', -- change to a real senders email address
        p_body     => l_body,
        p_subj     => 'Leave Application');
APEX_MAIL.push_queue;
END;
Output: Leave applied from to

Answer 1

Hi,
l_body := 'Leave applied from '||to_date(nvl(:P10_REQUEST_FROM_DATE,sysdate),'DD/MON/YYYY')||' to '||to_date(nvl(:P10_REQUEST_TO_DATE,sysdate),'DD/MON/YYYY')||utl_tcp.crlf||utl_tcp.crlf;
use to_char instead of to_date.
l_body := 'Leave applied from '||to_char(nvl(:P10_REQUEST_FROM_DATE,sysdate),'DD/MON/YYYY')||' to '||to_char(nvl(:P10_REQUEST_TO_DATE,sysdate),'DD/MON/YYYY')||utl_tcp.crlf||utl_tcp.crlf;